Module diesel::sql_types

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Expand description

Types which represent a SQL data type.

The structs in this module are only used as markers to represent a SQL type. They should never be used in your structs. If you’d like to know the rust types which can be used for a given SQL type, see the documentation for that SQL type. Additional types may be provided by other crates.

To see which SQL type can be used with a given Rust type, see the “Implementors” section of FromSql.

Any backend specific types are re-exported through this module

Modules

  • is_nullable
    Possible values for SqlType::IsNullable
  • ops
    Represents the output of numeric operators in SQL

Structs

  • BigInt
    The big integer SQL type.
  • Binary
    The binary SQL type.
  • Bool
    The boolean SQL type.
  • Date
    The date SQL type.
  • Double
    The double precision float SQL type.
  • Float
    The float SQL type.
  • Integer
    The integer SQL type.
  • Interval
    The interval SQL type.
  • Json
    The JSON SQL type. This type can only be used with feature = "serde_json"
  • Nullable
    The nullable SQL type.
  • Numeric
    The arbitrary precision numeric SQL type.
  • SmallInt
    The small integer SQL type.
  • Text
    The text SQL type.
  • Time
    The time SQL type.
  • Timestamp
    The timestamp SQL type.
  • TinyInt
    The tiny integer SQL type.
  • Untyped
    Query nodes with this expression type do not have a statically at compile time known expression type.

Traits

  • AllAreNullable
    Are both values of IsNull are nullable?
  • BoolOrNullableBool
    A marker trait for accepting expressions of the type Bool and Nullable<Bool> in the same place
  • Foldable
    Represents SQL types which can be used with SUM and AVG
  • HasSqlType
    Indicates that a SQL type exists for a backend.
  • IntoNotNullable
    Converts a type which may or may not be nullable into its not nullable representation.
  • IntoNullable
    Converts a type which may or may not be nullable into its nullable representation.
  • MaybeNullableType
    A type level constructor for maybe nullable types
  • OneIsNullable
    Is one value of IsNull nullable?
  • SingleValue
    A marker trait indicating that a SQL type represents a single value, as opposed to a list of values.
  • SqlOrd
    Marker trait for types which can be used with MAX and MIN
  • SqlType
    A marker trait for SQL types
  • TypeMetadata
    Information about how a backend stores metadata about given SQL types

Type Definitions

Derive Macros

  • DieselNumericOps
    Implement numeric operators for the current query node
  • SqlType
    Implement necessary traits for adding a new sql type